Liquid crystal display module

ABSTRACT

A liquid crystal display module includes a liquid crystal module and a polarizer stacked with each other. The polarizer includes a polarizing layer, a transparent conductive layer and at least two driving-sensing electrodes. The polarizing layer and the transparent conductive layer are stacked with each other. The at least two driving-sensing electrodes are spaced from each other and electrically connected with the transparent conductive layer.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims all benefits accruing under 35 U.S.C. §119 fromChina Patent Application No. 201210255137.2, filed on Jul. 23, 2012, inthe China Intellectual Property Office, the disclosure of which isincorporated herein by reference. The application is also related tocopending application entitled, “LIQUID CRYSTAL DISPLAY MODULE”, filedApr. 25, 2013 Ser. No. 13/869,958; “METHOD FOR MAKING LIQUID CRYSTALDISPLAY MODULE”, filed Apr. 25, 2013 Ser. No. 13/869,961; AND “METHODFOR MAKING LIQUID CRYSTAL DISPLAY MODULE”, filed Apr. 25, 2013 Ser. No.13/869,964; “LIQUID CRYSTAL DISPLAY MODULE”, U.S. application Ser. No.13/837,266, filed Mar. 15, 2013, and “LIQUID CRYSTAL DISPLAY MODULE”,U.S. application Ser. No. 13/837, 359 filed Mar. 15, 2013; “POLARIZER”,U.S. application Ser. No. 13/730,711, filed Dec. 28, 2012; “POLARIZER”,U.S. application Ser. No. 13/730,884, filed Dec. 29, 2012.

BACKGROUND

1. Technical Field

The present disclosure relates to liquid crystal display module,particularly to a liquid crystal display module with touch sensingcapability.

2. Description of Related Art

A conventional liquid crystal display module for a liquid crystaldisplay (LCD), according to the prior art, generally includes a firstpolarizer, a thin film transistor panel, a first alignment layer, aliquid crystal layer, a second alignment layer, a common electrode layer(e.g., an indium tin oxide (ITO) layer), an upper board, and a secondpolarizer. The TFT panel includes a plurality of pixel electrodes. Thepolarizing directions of the first and second polarizer areperpendicular to each other. When a voltage is applied between the pixelelectrode and the common electrode layer, the liquid crystal moleculesin the liquid crystal layer between the first alignment layer and thesecond alignment layer align along a same direction to make the lightbeams polarized by the first polarizer irradiate on the second polarizerdirectly without rotation. The polarized light beams cannot pass throughthe first polarizer. Without a voltage applied to the pixel electrodeand the common electrode layer, the polarized light beams rotated by theliquid crystal molecules can pass through the second polarizer.Selectively applying voltages between different pixel electrodes and thecommon electrode layer can control the on and off of different pixels,thus displaying images.

A conventional polarizing layer is made by using a transparent polymerfilm (e.g., PVA film) to absorb the dichroism material, and thedichroism material. The dichroism material is infiltrated into thetransparent polymer film, and the transparent polymer film aligns withthe dichroism material in one direction. In addition to the polarizinglayer, the conventional polarizer also includes protective layers,adhesive layer, separating layer covered on two opposite surfaces of thepolarizing layer. During the manufacturing of the liquid crystal displayscreen, the second polarizer is directly attached to a top surface ofthe upper board.

In recent years, there is continuous growth in the number of electronicapparatuses equipped with optically transparent touch panels in front oftheir respective display devices (e.g., liquid crystal display screen).The touch panel is commonly attached to the top surface of the secondpolarizer. However, this arrangement will increase a thickness of theelectronic apparatuses. Further, the touch panel and the secondpolarizer are individually manufactured and assembled, which increasesthe complexity of the manufacturing process, and increases the cost forproduction.

What is needed, therefore, is to provide a LCD module for solving theproblem discussed above.

BRIEF DESCRIPTION OF THE DRAWINGS

Many aspects of the embodiments can be better understood with referenceto the following drawings. The components in the drawings are notnecessarily drawn to scale, the emphasis instead being placed uponclearly illustrating the principles of the embodiments. Moreover, in thedrawings, like reference numerals designate corresponding partsthroughout the several views.

FIG. 1 is a schematic cross-sectional view of an embodiment of a LCDmodule.

FIG. 2 is a schematic view of an embodiment of a polarizer in the LCDmodule of FIG. 1.

FIG. 3 shows a scanning electron microscope image of a carbon nanotubefilm.

FIG. 4 is a schematic view of a carbon nanotube segment of the carbonnanotube film.

FIG. 5 is a side view of another embodiment of a polarizer.

FIG. 6 is a side view of yet another embodiment of a polarizer.

FIG. 7 is a side view of yet another embodiment of a polarizer.

DETAILED DESCRIPTION

The disclosure is illustrated by way of example and not by way oflimitation in the figures of the accompanying drawings in which likereferences indicate similar elements. It should be noted that referencesto “an” or “one” embodiment in this disclosure are not necessarily tothe same embodiment, and such references mean at least one.

Referring to FIG. 1 and FIG. 2, one embodiment of a liquid crystaldisplay (LCD) module 10 includes a polarizer 12 and a liquid crystalmodule 14 disposed on a surface of the polarizer 12. The polarizer 12 iscapable of sensing touches, occurred thereon, and polarizing light. Thepolarizer 12 is an integral structure which can be independent and freeinstallation and disassembling.

The polarizer 12 includes a first polarizing layer 120, a transparentconductive layer 122, and at least two driving-sensing electrodes 124.The first polarizing layer 120 and the transparent conductive layer 122are stack with other. The at least two driving-sensing electrodes 124are spaced from each other and electrically connected with thetransparent conductive layer 122.

The first polarizing layer 120 can be an insulating material layerhaving a light polarizing function. More specifically, the firstpolarizing layer 120 includes a transparent polymer film (e.g., PVAfilm) and a dichroism material infiltrated in the transparent polymerfilm. The dichroism material can be iodoquinine sulfate. The moleculesof the dichroism material can align along the same direction.

The at least two driving-sensing electrodes 124 are spaced from eachother and can be disposed on a surface of the transparent conductivelayer 122 away from the first polarizing layer 120. In one embodiment,the transparent conductive layer 122 has a square shape having foursides, the polarizer 12 includes four driving-sensing electrodes 124,and each one of the four sides is disposed one driving-sensing electrode124. In one embodiment, four driving-sensing electrodes 124 areseparately disposed on corners of the transparent conductive layer 122.The at least two driving-sensing electrodes 124 can be made of at leastone material of a metal, a conductive polymer, and a carbon nanotubelayer including a plurality of carbon nanotubes. The at least twodriving-sensing electrodes 124 can be formed by screen printing,sputtering, evaporating, or coating methods. The transparent conductivelayer 122 and the at least two driving-sensing electrodes 124cooperatively form a touch control module.

The transparent conductive layer 122 can be directly in contact with asurface of the first polarizing layer 120. In one embodiment, thetransparent conductive layer 122 includes a carbon nanotube filmcomprising a plurality of carbon nanotubes orderly arranged. Theplurality of carbon nanotubes are substantially aligned along a samedirection so that the carbon nanotube film has a maximum electricalconductivity at the aligned direction of the carbon nanotubes which isgreater than at other directions.

The carbon nanotube film can be formed by drawing the film from a carbonnanotube array. The overall aligned direction of a majority of thecarbon nanotubes in the carbon nanotube film is substantially alignedalong the same direction and parallel to a surface of the carbonnanotube film. The carbon nanotube is joined to adjacent carbonnanotubes end to end by van der Waals force therebetween, and the carbonnanotube film is capable of being a free-standing structure. A supporthaving a large surface area to support the entire free-standing carbonnanotube film is not necessary, and only a supportive force at oppositesides of the film is sufficient. The free-standing carbon nanotube filmcan be suspended and maintain its own film state with only supports atthe opposite sides of the film. When disposing (or fixing) the carbonnanotube film between two spaced supports, the carbon nanotube filmbetween the two supports can be suspended while maintaining itsintegrity. The successively and aligned carbon nanotubes joined end toend by van der Waals attractive force in the carbon nanotube film is themain reason for the free-standing property. The carbon nanotube filmdrawn from the carbon nanotube array has a good transparency. In oneembodiment, the carbon nanotube film is substantially a pure film andconsists essentially of the carbon nanotubes, and to increase thetransparency of the touch panel, the carbon nanotubes are notfunctionalized. The free-standing carbon nanotube film can be directlyattached to the surface of the first polarizing layer 120.

Referring to FIG. 3, the plurality of carbon nanotubes in the carbonnanotube film have a preferred orientation along the same direction. Thepreferred orientation means that the overall aligned direction of themajority of carbon nanotubes in the carbon nanotube film issubstantially along the same direction. The overall aligned direction ofthe majority of carbon nanotubes is substantially parallel to thesurface of the carbon nanotube film, thus parallel to the surface of thepolarizing layer. Furthermore, the majority of carbon nanotubes arejoined end to end therebetween by van der Waals force. In thisembodiment, the majority of carbon nanotubes are substantially alignedalong the same direction in the carbon nanotube film, with each carbonnanotube joined to adjacent carbon nanotubes at the aligned direction ofthe carbon nanotubes end to end by van der Waals force. There may be aminority of carbon nanotubes in the carbon nanotube film that arerandomly aligned, but the number of randomly aligned carbon nanotubes isvery small compared to the majority of substantially aligned carbonnanotubes and therefore will not affect the overall oriented alignmentof the majority of carbon nanotubes in the carbon nanotube film.

In the carbon nanotube film, the majority of carbon nanotubes that aresubstantially aligned along the same direction may not be completelystraight. Sometimes, the carbon nanotubes can be curved or not exactlyaligned along the overall aligned direction, and can deviate from theoverall aligned direction by a certain degree. Therefore, it cannot beexcluded that partial contacts may exist between the juxtaposed carbonnanotubes in the majority of carbon nanotubes aligned along the samedirection in the carbon nanotube film. Despite having curved portions,the overall alignment of the majority of the carbon nanotubes aresubstantially aligned along the same direction.

Referring to FIG. 4, the carbon nanotube film includes a plurality ofsuccessive and oriented carbon nanotube segments 223. The plurality ofcarbon nanotube segments 223 are joined end to end by van der Waalsattractive force. Each carbon nanotube segment 223 includes a pluralityof carbon nanotubes 225 that are substantially parallel to each other,and the plurality of parallel carbon nanotubes 225 are in contact witheach other and combined by van der Waals attractive force therebetween.The carbon nanotube segment 223 can have a desired length, thickness,uniformity, and shape. The carbon nanotubes 225 in the carbon nanotubefilm have a preferred orientation along the same direction. The carbonnanotube wires in the carbon nanotube film can consist of a plurality ofcarbon nanotubes joined end to end. The adjacent and juxtaposed carbonnanotube wires can be connected by the randomly aligned carbonnanotubes. There can be clearances between adjacent and juxtaposedcarbon nanotubes in the carbon nanotube film. A thickness of the carbonnanotube film at the thickest location is about 0.5 nanometers to about100 microns (e.g., in a range from 0.5 nanometers to about 10 microns).

A method for drawing the carbon nanotube film from the carbon nanotubearray includes: (a) selecting a carbon nanotube segment 223 from acarbon nanotube array using a drawing tool, such as an adhesive tape oradhesive substrate bar contacting the carbon nanotube array, to selectthe carbon nanotube segment 223; and (b) moving the drawing tool anddrawing the selected carbon nanotube segment 223 at a certain speed,such that a plurality of carbon nanotube segments 223 are drawn joinedend to end, thereby forming a successive carbon nanotube film. Theplurality of carbon nanotubes of the carbon nanotube segment 223 arejuxtaposed to each other. While the selected carbon nanotube segment 223gradually separates from the growing substrate of the carbon nanotubearray along the drawing direction under the drawing force, the othercarbon nanotube segments 223 that are adjacent to the selected carbonnanotube segment 223 are successively drawn out end to end under theaction of the van der Waals force, thus forming a successive and uniformcarbon nanotube film having a width and preferred orientation.

The carbon nanotube film has a unique impedance property because thecarbon nanotube film has a minimum electrical impedance in the drawingdirection, and a maximum electrical impedance in the directionperpendicular to the drawing direction, thus the carbon nanotube filmhas an anisotropic impedance property. A relatively low impedancedirection D is the direction substantially parallel to the aligneddirection of the carbon nanotubes, and a relatively high impedancedirection H is substantially perpendicular to the aligned direction ofthe carbon nanotubes. The carbon nanotube film can have a square shapewith four sides. Two sides are opposite to each other and substantiallyparallel to the relatively high impedance direction H. The other twosides are opposite to each other and substantially parallel to therelatively low impedance direction D. In one embodiment, a ratio betweenthe impedance at the relatively high impedance direction H and theimpedance at the relatively low impedance direction D of the carbonnanotube film is equal to or greater than 50 (e.g., in a range from 70to 500). The at least two driving-sensing electrodes 124 can be disposedon and electrically connected with the two opposite sides of the carbonnanotube film which are perpendicular to relatively low impedancedirection D. In other words, the majority of carbon nanotubes in thecarbon nanotube films extends from one of the at least twodriving-sensing electrodes 124 to the other one of the at least twodriving-sensing electrodes 124.

The transparent conductive layer 122 can include a plurality of carbonnanotube films laminated to each other or arranged side to side. Thecarbon nanotubes in the plurality of carbon nanotube films can bealigned along the same direction and extend from one of the at least twodriving-sensing electrodes 124 to the other one of the at least twodriving-sensing electrodes 124. In one embodiment, the transparentconductive layer 122 includes a plurality of carbon nanotube filmsoverlapped with each other and aligned directions of the carbonnanotubes in adjacent carbon nanotube films are substantiallyperpendicular to each other. In other words, some carbon nanotubes arealigned along a first direction and the other carbon nanotubes arealigned along a second direction, that is perpendicular to the firstdirection. In this situation, the polarizer 12 includes fourdriving-sensing electrodes 124, two driving-sensing electrodes 124 aredisposed on and electrically connected with two opposite sides of thetransparent conductive layer 122 parallel to the first direction and theother two driving-sensing electrodes 124 are disposed on andelectrically connected with two opposite sides of the transparentconductive layer 122 parallel to the second direction. The carbonnanotube film can have a transmittance of visible light above 85%.

The transparent conductive layer 122 also can be a carbon nanotubecomposite film. The carbon nanotube composite film includes the carbonnanotube film and a polymer material infiltrating the carbon nanotubefilm. Spaces can exist between adjacent carbon nanotubes in the carbonnanotube film and thus the carbon nanotube film defines a number ofmicropores by the adjacent carbon nanotubes. The polymer material isfilled into the number of micropores of the carbon nanotube film to formthe carbon nanotube composite film. The polymer material can bedistributed uniformly in the carbon nanotube composite film. The polymermaterial can be polystyrene, polyethylene, polycarbonate, polymethylmethacrylate (PMMA), polycarbonate (PC), polyethylene terephthalate(PET), benzocyclobutene (BCB), or polyalkenamer. In one embodiment, thepolymer material is PMMA. The carbon nanotube composite film can includeone or more carbon nanotube films. The carbon nanotube composite filmcan have a uniform thickness. A thickness of the carbon nanotubecomposite film is only limited by the degree of transparency desired. Inone embodiment, the thickness of the carbon nanotube composite film canrange from about 0.5 nanometers to about 100 microns.

The polarizer 12 can further include a conducting wire (not shown), toelectrically connect the driving-sensing electrodes 124 to an outercircuit. The conducting wire can be arranged around the transparentconductive layer 122 with the driving-sensing electrodes 124.

In one embodiment, the polarizer 12 includes the four bar shapeddriving-sensing electrodes 124 separately disposed on four sides of thetransparent conductive layer 122. In use, a voltage is applied to thetransparent conductive layer 122 via the four driving-sensing electrodes124 to form an equipotential surface. When the surface of the polarizer12 is contacted via hands or touch pens, a coupling capacitance isformed between the touching material and the transparent conductivelayer 122. The current then flows from the four driving-sensingelectrodes 124 to the touching point. The position of the touching pointis confirmed via calculating the ratio and the intensity of the currentthrough the electrodes.

Referring to FIG. 5, the polarizer 12 can further include at least oneof a protective layer 150, and an adhesive layer 160. The protectivelayer 150 is used to protect the first polarizing layer 120 and thetransparent conductive layer 122. The adhesive layer 160 is used tocombine the polarizer 12 with the liquid crystal module 14. The materialof the protective layer 150 can be at least one of triacetyl cellulose(TAC), polystyrene, polyethylene, polyethylene terephthalate (PET),poly(methyl methacrylate) (PMMA), polycarbonate (PC), andbenzocyclobutene (BCB). The material of the adhesive layer 160 can be UVadhesive, pressure sensitive adhesive, or thermal sensitive adhesive.

The first polarizing layer 120 can solely form a polarizer main body, orcooperatively form the polarizer main body with at least one of theprotective layer 150 and the adhesive layer 160. The transparentconductive layer 122 can be arranged on a surface of the polarizer mainbody, or inserted into the polarizer main body.

In one embodiment, the polarizer 12 includes two protective layers 150respectively attached to the surface of the transparent conductive layer122 and the surface of the first polarizing layer 120, to sandwich thetransparent conductive layer 122 and the first polarizing layer 120between the two protective layers 150. The transparent conductive layer122 and the first polarizing layer 120 are located between the twoprotective layers 150. The adhesive layer 160 is arranged on the surfaceof the protective layer 150 which is near to the transparent conductivelayer 122.

Referring to FIG. 6, in another embodiment, the polarizer 12 includestwo protective layers 150 respectively attached to the two surfaces ofthe first polarizing layer 120, to sandwich the first polarizing layer120 between the two protective layers 150. The first polarizing layer120 is located between the two protective layers 150. The transparentconductive layer 122 is arranged on the outer surface of one of the twoprotective layers 150. The one of the two protective layers 150 islocated between the transparent conductive layer 122 and the firstpolarizing layer 120. The adhesive layer 160 is arranged on the outersurface of the transparent conductive layer 122, to sandwich thetransparent conductive layer 122 between the adhesive layer 160 and theprotective layer 150.

Referring to FIG. 7, in yet another embodiment, the polarizer 12includes two protective layers 150 respectively attached to the twosurfaces of the first polarizing layer 120, to sandwich the firstpolarizing layer 120 between the two protective layers 150. The adhesivelayer 160 is arranged on the outer surface of one of the two protectivelayers 150. The transparent conductive layer 122 is arranged on theouter surface of the adhesive layer 160, to sandwich the adhesive layer160 between the transparent conductive layer 122 and the protectivelayer 150.

In the above described embodiments, the transparent conductive layer 122can be the freestanding carbon nanotube film. The freestanding carbonnanotube film can be formed independently from the other parts of thepolarizer 12, and further attached to the needing surface in thepolarizer 12.

Referring back to FIG. 1, the liquid crystal module 14 is disposed onthe surface of transparent conductive layer 122 away from the firstpolarizing layer 120. The liquid crystal module 14 includes an uppersubstrate 141, an upper electrode layer 142, a first alignment layer143, a liquid crystal layer 144, a second alignment layer 145, a thinfilm transistor panel 146, and a second polarizing layer 147 stacked insequences.

The upper substrate 141 can be a transparent plate. The upper substrate141 can be made of glass, quartz, diamond, plastic or resin. A thicknessof the upper substrate 141 can range from about 1 millimeter to about 1centimeter. In one embodiment, the upper substrate 141 is a PET film andthe thickness of the upper substrate 141 is about 2 millimeters.

The upper electrode layer 142 can include conductive materials, such asmetals, ITO, ATO (tin antimony oxide), conductive polymer materials, orcarbon nanotubes.

The first alignment layer 143 can include a plurality of substantiallyparallel first grooves (not shown) located on a lower surface of thefirst alignment layer 143. The second alignment layer 145 can include aplurality of substantially parallel second grooves (not shown) locatedon an upper surface of the second alignment layer 145. An alignmentdirection of the first grooves is substantially perpendicular to analignment direction of the second grooves. Therefore, the alignmentdirection of the liquid crystal molecules differ by about 90 degreesbetween the first alignment layer 143 and the second alignment layer145, which play a role in shifting the light beams by 90 degrees.

A material of the first alignment layer 143 and the second alignmentlayer 145 can be polystyrenes and derivatives of the polystyrenes,polyimides, polyvinyl alcohols, polyesters, epoxy resins, polyurethanes,or other polysilanes. The first grooves and the second grooves can beformed by a rubbing method, a tilt deposition method, a micro-groovestreatment method, or a SiOx-depositing method. In one embodiment, thematerial of the first alignment layer 143 and the second alignment layer145 is polyimide and a thickness thereof ranges from about 1 micrometerto about 50 micrometers.

The liquid crystal layer 144 includes a plurality of oval shaped liquidcrystal molecules. Understandably, the liquid crystal layer 144 can alsobe made of other conventional suitable materials, such as alkyl benzoicacid, alkyl cyclohexyl acid, alkyl cyclohexyl-phenol, and phenylcyclohexane. A thickness of the liquid crystal layer 144 ranges fromabout 1 micrometer to about 50 micrometers. In one embodiment, thethickness of the liquid crystal layer 144 is about 5 micrometers.

The detailed structure of the thin film transistor panel 146 is notshown in FIG. 1. It is to be understood that the thin film transistorpanel 146 can further include a transparent base, a number of thin filmtransistors located on the transparent base, a number of pixelelectrodes, and a display driver circuit (not shown). The thin filmtransistors correspond to the pixel electrodes in a one-to-one manner.The thin film transistors are connected to the display driver circuit bythe source lines and gate lines. The pixel electrodes are controlled tocooperate with the upper electrode layer 142 to apply a voltage to theliquid crystal layer 144. The pixel electrodes correspond to a touchregion 126.

The second polarizing layer 147 can cooperate with the first polarizinglayer 120 to control light extraction intensity of the liquid crystalmodule 14. Materials of the first polarizing layer 120 and the secondpolarizing layer 147 can be the same. A polarizing direction of thesecond polarizing layer 147 can be substantially perpendicular to thepolarizing direction of the first polarizing layer 120.

In one embodiment, the first polarizing layer 120 can be disposed on anddirectly contact the surface of the upper substrate 141 away from thesecond polarizing layer 147 to form the liquid crystal display module10. In other words, in the liquid crystal display module 10, the firstpolarizing layer 120 can be disposed between the transparent conductivelayer 122 and the upper substrate 141.

It is to be understood that the described embodiments are intended toillustrate rather than limit the disclosure. Any elements described inaccordance with any embodiments is understood that they can be used inaddition or substituted in other embodiments. Embodiments can also beused together. Variations may be made to the embodiments withoutdeparting from the spirit of the disclosure. The disclosure illustratesbut does not restrict the scope of the disclosure.

What is claimed is:
 1. A liquid crystal display module comprising: aliquid crystal module comprising an upper substrate, an upper electrodelayer, a first alignment layer, a liquid crystal layer, a secondalignment layer, a thin film transistor panel, and a second polarizinglayer stacked in sequence; and a polarizer located on the uppersubstrate, the polarizer having touch sensing capability, the polarizercomprising: a first polarizing layer located on the upper substrate; atransparent conductive layer stacked with the first polarizing layer,the transparent conductive layer being an anisotropic impedance layerhaving a relatively low impedance direction, an electrical conductivityof the anisotropic impedance layer on the relatively low impedancedirection being greater than electrical conductivities of theanisotropic impedance layer on other directions; and at least twodriving-sensing electrodes being spaced from each other and electricallyconnected with the transparent conductive layer; wherein a polarizingdirection of the first polarizing layer is substantially parallel to therelatively low impedance direction.
 2. The liquid crystal display moduleof claim 1, wherein the polarizer is an integral structure capable ofbeing independently installed to the liquid crystal display module. 3.The liquid crystal display module of claim 1, wherein the transparentconductive layer comprises at least one carbon nanotube film, and amajority of carbon nanotubes in the at least one carbon nanotube filmare substantially aligned along an aligned direction.
 4. The liquidcrystal display module of claim 3, wherein the at least one carbonnanotube film is a free-standing structure that is directly attached toa surface of the first polarizing layer.
 5. The liquid crystal displaymodule of claim 3, wherein the majority of carbon nanotubes are joinedend to end by van der Waals attractive force therebetween.
 6. The liquidcrystal display module of claim 3, wherein the majority of carbonnanotubes are substantially parallel to a surface of the firstpolarizing layer.
 7. The liquid crystal display module of claim 3,wherein a polarizing direction of the first polarizing layer is parallelto the aligned direction of the majority of carbon nanotubes.
 8. Theliquid crystal display module of claim 1, wherein the transparentconductive layer comprises a carbon nanotube composite film, the carbonnanotube composite film comprises at least one carbon nanotube film anda polymer material infiltrating the at least one carbon nanotube film,and a majority of carbon nanotubes in the at least one carbon nanotubefilm are substantially aligned along a same direction.
 9. The liquidcrystal display module of claim 1, wherein the polarizer comprises fourdriving-sensing electrodes spaced from each other, the transparentconductive layer is square shaped having four sides, each of the foursides is electrically connected with one of the four driving-sensingelectrodes.
 10. The liquid crystal display module of claim 1, whereinthe transparent conductive layer consists of carbon nanotubes.
 11. Theliquid crystal display module of claim 1, wherein the polarizer furthercomprises a protective layer disposed between the first polarizing layerand the transparent conductive layer.
 12. The liquid crystal displaymodule of claim 11, wherein the polarizer further comprises an adhesivelayer disposed on a surface of the transparent conductive layer awayfrom the first polarizing layer.
 13. The liquid crystal display moduleof claim 1, wherein the polarizer further comprises a protective layerdisposed on a surface of the transparent conductive layer spaced fromthe first polarizing layer.
 14. The liquid crystal display module ofclaim 13, wherein the polarizer further comprises an adhesive layerdisposed on a surface of the protective layer away from the transparentconductive layer.
 15. A liquid crystal display module comprising aliquid crystal module and a polarizer located on a surface of the liquidcrystal module, the polarizer having touch sensing capability, thepolarizer comprising: a polarizing layer; a transparent conductive layerstacked with the polarizing layer, the transparent conductive layerbeing an anisotropic impedance layer having a relatively low impedancedirection, an electrical conductivity of the anisotropic impedance layeron the relatively low impedance direction being greater than electricalconductivities of the anisotropic impedance layer on other directions;and at least two driving-sensing electrodes being spaced from each otherand electrically connected with the transparent conductive layer;wherein the polarizer is an integral structure capable of beingindependent installed to and dissembled from the liquid crystal displaymodule, the transparent conductive layer is disposed between thepolarizing layer and the liquid crystal module, and a polarizingdirection of the first polarizing layer is substantially parallel to therelatively low impedance direction.
 16. A liquid crystal display modulecomprising a liquid crystal module and a polarizer located on a surfaceof the liquid crystal module, the polarizer having touch sensingcapability, the polarizer comprising: a polarizing layer; a transparentconductive layer stacked with the polarizing layer, and the transparentconductive layer being an anisotropic impedance layer having arelatively low impedance direction, an electrical conductivity of theanisotropic impedance layer on the relatively low impedance directionbeing greater than electrical conductivities of the anisotropicimpedance layer on other directions; and at least two driving-sensingelectrodes being spaced from each other and electrically connected withthe transparent conductive layer; wherein the polarizer is an integralstructure capable of being independently installed to and dissembledfrom the liquid crystal display module and a polarizing direction of thefirst polarizing layer is substantially parallel to the relatively lowimpedance direction.
 17. The liquid crystal display module of claim 16,wherein the polarizing layer is disposed between the transparentconductive layer and the liquid crystal module.
 18. The liquid crystaldisplay module of claim 1, wherein the at least two driving-sensingelectrodes directly contact the transparent conductive layer.